mapped, edited, and published by the Geological Survey in cooperation with the Michigan State Highway Department.Geological Survey[1984]<YG1-U-Mich-2.4-3970-1-SW>
mapped, edited, and published by the Geological Survey in cooperation with the Michigan State Highway Department.Geological Survey[1982]<YG1-U-Mich-2.4-3970-1-SE>